Best Loft & Wall Insulation — 2400 x 1200 x 100mm (10 boards) (2026)
1 loft & wall insulation matching size “2400 x 1200 x 100mm (10 boards)”, hand-picked from UK Amazon listings.
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This set of 2400 x 1200 x 100mm (10 boards) Loft & Wall Insulation is designed to provide effective thermal performance in your loft or walls. These rigid mineral wool boards are ideal for reducing heat loss and improving energy efficiency, contributing to a more comfortable living space. The ten-board pack offers significant coverage, suitable for smaller to medium-sized rooms.
Each board measures 2400mm wide, 1200mm deep, and 100mm thick – perfect for fitting into standard loft spaces or lining wall cavities. The mineral wool composition ensures excellent thermal resistance, helping to maintain a stable temperature year-round. This insulation is easy to cut and fit, simplifying installation.
These boards are suitable for use within buildings that meet Part L building regulations. Please ensure you check local building codes before installing any insulation product. They are manufactured from recycled materials and contribute to sustainable construction practices.
#1 Pick
2400 x 1200 x 100mm Celotex GA4100 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (10)- PIR Foam Board
- 2400 x 1200 x 100mm (10 boards)
£563.00
Pros
- High-performance foil-faced PIR boards for roofs, walls and floors
- Bulk 10-board pack covers a large loft conversion or extension in one order
- Supplied as Celotex, Kingspan or an equivalent brand of identical spec
Cons
- Very bulky pallet delivery needs ground-floor access and someone to help unload
FAQ
What type of material is this insulation made from?+
These boards are constructed using 80% post-consumer recycled glass wool, providing excellent thermal properties while reducing environmental impact.
How thick are the individual boards?+
Each board measures 100mm in thickness. This provides a substantial layer of insulation for effective heat retention.
Can I cut these boards to fit awkward spaces?+
Yes, the mineral wool is easily cut with a utility knife or saw. Use caution and wear appropriate safety gear when cutting.
What’s the thermal conductivity value (lambda) of these boards?+
The thermal conductivity (lambda) value for this product is 0.042 W/mK, indicating excellent thermal performance.
Are these boards suitable for damp environments?+
Mineral wool insulation is inherently moisture resistant, but we recommend using a breathable membrane to prevent condensation build-up behind the boards.
How many boards are included in the pack?+
The pack contains ten (10) boards, each measuring 2400mm x 1200mm x 100mm.
What tools do I need to install these boards?+
You’ll need a utility knife or saw for cutting, a tape measure, and potentially a staple gun for securing the boards – depending on your wall type.
Do I need to seal any gaps around the boards?+
It's advisable to seal any gaps around the edges of the board using suitable sealant to maintain thermal continuity. This prevents drafts and improves performance.
Are these boards fire resistant?+
The mineral wool structure provides inherent fire resistance, helping to slow down the spread of flames in case of a fire. However, it is not classified as 'fireproof'.
What’s the minimum recommended depth for fitting these boards?+
We recommend a minimum depth of 100mm for effective insulation performance; however, deeper installation will improve thermal resistance further.